A clinical trial seeking patients for a research study for the treatment of Opioid Induced Constipation

Brief description of study

This is an open-label, multicenter extension of study 3200K1-4000-WW that will evaluate the
safety of methylnaltrexone. This drug will be administered by subcutaneous injection and will
be tested in late stage, advanced illness patients who have constipation caused by opioid
pain relievers. This study will last 3 months.